I then looked the company and the supervisor up on Linkedin.

Not sure terms of your Hard Money (if you work with any), but reach out to all of the HMLs you can here and on LinkedIn and get their terms and negotiate them...now that you've done 3, you can get better terms if you shop aroundAll the best man and contact me any time for any other questions. 

I'd look up a broker on LinkedIn.

Get a LinkedIn profile and put what you are doing on it.

Hopefully it's not much.If you don't want to bail just yet:You could market your properties - here on Bigger Pockets.You could market your properties on some of the Facebook groups or LinkedIn groups.Call some of the other bandit signs in town (other wholesalers) and see if they have any buyers for your deals.And if none of that works - you could tell the seller that your partner on the deal backed out but that you will help him/her sell the property for free.

LinkedIn says based out of Chicago, ILL 

LinkedIn - join real estate groups and network with the members2.

I'm curious to hear what others in real estate have to say about this issue, because I'd like to start using social media effectively as it applies to real estate investing.My day job is doing lead generation for B2B companies using LinkedIn, and their biggest struggles are: cutting through the noise, getting clear on their messaging, finding their prospects on social media, creating systems/metrics to track what's working and not, and having someone to actually implement their strategy for them. 

I plan on becoming much more active within the BP community and am welcoming to all advice, colleague requests, or Linkedin invites. 

Twitter and Linked-In I'm not so impressed with.... at least not yet.